®
CIG ® Crescent Internal Gear Pumps
A pump with features that you’ve
been looking for
No matter what your market, no matter what industry you
The CIG pump design combines the best features of a variety of
serve, no matter where you are in the world, Colfax provides
technologies in one single, efficient unit:
pumping solutions that are engineered, manufactured,
•
Simple design as in conventional gear pumps
installed, serviced and supported to make sure your specific
•
High pressure capability as in piston pumps
requirements are met.
•
Low viscosity operational capability as in centrifugal pumps
•
Low noise levels and ripple free flow as in screw pumps
The Imo CIG pump line is a family of rugged, reliable, high
pressure pumps with silent, ripple-free performance. Longer
What do low operating noise levels mean to you?
life, lower pressure ripple, lower contamination sensitivity and
•
No acoustic enclosures required
maximum energy savings result in the highest “Total Savings
•
No remote location of the pump
of Ownership” across the entire life-cycle of your pumping
•
No lengthy runs of piping
equipment solution.
The pump is only part of your total fluid transport solution that
helps meet the needs of your demanding market. With Colfax,
you also get deep expertise that ensures even your most
critical applications are handled efficiently and effectively
with short-term / long-term results that go straight to your
bottom line.
CIG pump performance
is field proven with thousands
of operating units installed
worldwide.
Crescent Internal Gear (CIG) Pumps
Unique design principles of the CIG pump
The success of the CIG series pump lies in the fundamental
The patented gear tooth profile compensates for metal-to-
design principle of using hydrodynamic lift to separate all
metal contact of the gear teeth. This patented gear tooth
moving contact areas. This internal gear design does not use any
profile greatly reduces the Hertzian compression stresses
axial or radial compensation, virtually eliminating contamination
(gear tooth contact loads) on the gear flanks compared to an
caused by axially loaded side plates or radial thrust shoe
Involute profile. (See figure below.) Also, the relative velocities
designs. The only loaded parts are the sleeve bearings of the
in the area of the largest forces on the gear teeth are minimal
drive shaft and the housing surrounding the outer ring gear,
in relation to the strength of the material.
which also acts as a sleeve bearing.
CIG pumps are commonly used for lubrication, high-pressure
Hydrodynamic lift (fluid film support) is created through the
fuel and hydraulic applications in mobile or stationary
friction of the fluid media. This is formed between the shaft
environments. It is capable of handling a broad range of fluids
bushing and the shaft and also between the ring-gear outside
with low or high viscosities at flow rates from 1 to 115 GPM
diameter and gear-housing inside diameter. The hydrodynamic
(3.8 to 435 liters per minute) in a single pump.
lift prevents metal-to-metal contact between the stationary and
rotating components. Therefore there is no metal contact or
wear. The ring-gear and shaft float on a film of the fluid being
pumped.
Discharge Port
Gear Set
Journal Bearing
Ball Bearing
Shaft Seal (lip seal shown)
Ring Gear
Stationary Crescent
Suction Port
Pinion Gear
Drive Shaft
Suction
Pressure Zone
Hydrodynamic Lift
Patented profile prevents
fluid trapping during
the meshing of the gears
Real World Benefits
Low Pressure Ripple
Wide Speed Range
Typically less than 1% peak-to-peak at maximum pressure
Able to operate at high speed without a suction
performance.
boost, while delivering excellent suction lift characteristics.
Long Life
Modular Design
Due to the patented gear tooth profile and its low Hertzian
Space-saving single-, double- or triple-pump configurations
compression stresses during the meshing phase of the gears,
where each pump shares a common drive shaft requiring only
plus the incorporation of the hydrodynamic principle.
one driver.
Reliability
Wide Application Range
Excellent resistance to flow degradation when compared to most
Able to handle fluids with viscosities as low as 0.5 cSt and
other pump designs. Durable materials, plus design simplicity,
pressures up to 5000 PSI (345 BAR).
provide outstanding durability.
Low Noise
Typically less than 68 db(A) for most applications. The patented
gear tooth profile reduces trapped fluid and backlash in the gears
reducing pressure pulsations, keeping airborne noise to a minimum.
Keeping pulp and paper mills and
chemical processing plants operating at
peak performance all over the world.
Materials of Construction
Perfectly suited to a wide variety of
challenging applications, including:
• Hydraulic power
• Fatigue test equipment
• Marine hydraulics
• Liquid fuel injection
• Fuel component test
equipment
Mounting Flange:
Ductile Iron (nitride hardening optional)
Gear Housing(s):
Ductile Iron (nitride hardening optional)
Rear Cover:
Aluminum (steel optional)
Seal Housing:
Aluminum (steel optional)
Ring Gear:
Pearlitic Gray Iron
(nitride hardening optional)
Pinion Gear:
Alloy Steel (nitride hardened)
Shaft:
Alloy Steel (nitride hardened)
Pump Barrel:
Steel (multi-stage pumps only)
O-rings:
Fluorocarbon
Shaft Seals:
Teflon inner / Fluorocarbon outer
lip type (mechanical seal optional)
Sleeve Bearings:
Metal-Polymer composite
Design Characteristics:
Flow Range:
1 to 115 usgpm
Fluid Viscosity:
.5cSt minimum
Inlet Pressure:
7psig (options available
to allow 100+psig)
Differential Pressure:
To 5000psig
Temperature:
180˚F (options to allow 250˚F+)
Speed:
To 4500rpm (dependent on Frame size,
inlet pressure and fluid viscosity)
Products and Applications
APPLICATIONS
QUICK REFERENCE GUIDE
CIG-2
1- 6
5000
CIG-3
2 -14
5000
CIG-4
6-28
5000
CIG-5
14-25
5000
CIG-6
30-50
5000
CIG-8
60 -115
5000
HYDRAULIC
(PSIG)
CRUDE OIL
(USGPM)
PUMP
SERIES
LUBE
M AXI M UM
DISCHARGE
PRESSURE
FUEL
APPROXIMATE
FLOW RANGE
TYPICAL CIG PERFORMANCE (USGPM)
1.
2.
3.
4.
Pump
Model
@ 140ssu,
2000 psi,
1750 rpm
@ 140ssu,
2000 psi,
3500 rpm
@ 1.0 cSt,
250 psi,
1750 rpm
@ 1.0 cSt,
500 psi,
3500 rpm
22005
1.1
3.5
1.1
2.6
22006
1.5
4.4
1.5
3.5
22008
1.9
5.6
2.1
4.7
32010
2.4
7.1
2.8
6.2
32012
3
8.8
3.8
8.2
32016
4.1
11.3
5
10.6
42020
6.2
15.7
7.1
14.9
42025
8.1
19.7
9.1
18.9
42032
11
25.9
12.1
25
52040
14.1
-
15.1
-
52050
18.2
-
19.9
-
52063
24.3
-
25.5
-
62080
30.4
-
31.3
-
62100
39.2
-
40.3
-
62125
49.4
-
50.5
-
82160
63.5
-
65.5
-
82200
79.9
-
82.1
-
82250
100.5
-
105.1
-
Not to be used for pump selection.
Typical performance for single stage CIG pumps.
Pumps are suitable to operate to higher pressures.
For specific pump performance contact your local Colfax representative.
®
Colfax Crescent Internal Gear Pumps:
Leading Technology, Global Capacity
You may know Colfax best by our strong legacy brands that include Imo, Imo AB and
Allweiler. We serve customers just like you at facilities, manufacturing sites, and distribution
centers throughout the Americas, Europe, Africa, the Middle-East and Asia Pacic.
Our Global network of critical fluid handling technologies, solutions, services and support
are unmatched in the industries that we serve. The Colfax team in each of these regions
understand the challenges you face, respects the high stakes of mission critical equipment
and stands ready to deliver with the fluid handling solutions you need.
When precision is mandatory and failure not an option, the most trusted names in critical
fluid handling is Colfax.
Colfax Americas
1710 Airport Road
Monroe, NC 28110
USA
Tel: (704) 289-6511
(877) 853-7867
www.colfaxcorp.com
E-mail: cc@colfaxcorp.com
Allweiler, Fairmount Automation, Imo, Tushaco, Warren and Zenith are registered trademarks and Colfax,
Colfax Corporation and Houttuin are trademarks of Colfax Corporation. All other trademarks are the
property of their respective owners. ©2009 Colfax Corporation. All rights reserved.
BR000CIG Rev. 00 (09-1218)